Date: Tuesday, 27 August 1985
From: Ken Turkowski <ken%turtlevax.uucp>
To:   net.micro
Re:   FIFO chips

In article <[email protected]> [email protected] (Henry Spencer) writes:
>I'm seeking a particular variety of IC that I can't find in my own
>databook collection (which is substantial but by no means complete).
>What I want is a FIFO, at least 16x8, +5 only, with tri-state outputs.
>No single-source chips need apply.  It doesn't need to be terribly fast.
>Extra capacity is welcome but not very important.  In a pinch I'd be
>willing to put a pair of compact ...x4 chips side-by-side, but the tri-state
>outputs and the single power supply are necessary.
>
>I've got some leads, but nothing at all definite.  I'd like to hear
>about anything that might be suitable.  More specifically...  Is there
>a second source for TRW's 1030?  Is the Z8060 a real part (my Zilog
>databook is kind of old) with a second source?  Does the number "2812"
>ring a bell, and if so, who makes it?

No, no one else makes the TRW 1030.  The Z8060 is a real part but
slo-ooow (over a microsecond cycle time).  2812 sort of sounds like an
Intel number.

After years of domination of the FIFO market by MMI with their dinky
64x4 and 64x5 bubble-through FIFO's, the market has finally stabilized
on an good FIFO architecture with good performance:

Mostek  4501    512x9   200, 150, 120, 80 ns access time

IDT     7201    512x9   120, 80, 65, 50 ns
       7202    1024x9  120, 80, 65, 50 ns


For reference the MMI parts are the 67401 (64x4) and 67402 (64x5),
with similar parts made by Cypress, Fairchild, and National.  TI's got
some 16x4 and 16x5's (74LS222, 224, 227, 228, 74S225), but they are
small.

Here's some prices, current as of about April of 1984 (slightly old):

               SPEED                   PRICE
DEPTH   WIDTH   CYCLE   MFR     PART    (100)   (500)   (1000)

16      4       125ns   RCA     CB40105BE
16      4       100ns   Fairchild       74F403
16      4       100ns   Signetics       N9403
16      4       84ns    TI      SN74LS222       -       -       10.00
16      4       84ns    TI      SN74LS224       -       -       8.57
16      4       50ns    TI      SN74LS227       -       -       10.00
16      4       50ns    TI      SN74LS228       -       -       8.57
16      5       100ns   TI      SN74S225        7.00    5.00    4.70
64      4       100ns   Fairchild       74F43
64      4       100ns   Fairchild       74F433
64      4       100ns   MMI     C67401  29.95   29.95
64      4       100ns   National        DM87S401
64      4       100ns   National        DM87S401A
64      4       67ns    MMI     C67401A 31.01   31.01
64      4       60ns    MMI     C67401B 35.33   35.33
64      4       125ns   Fairchild       9423C
64      5       100ns   MMI     C67402  26.19   26.19
64      5       100ns   National        DM87S402
64      5       67ns    MMI     C67402A 38.76   38.76
64      5       67ns    National        DM87S402A
64      5       60ns    MMI     C67402B 43.34   43.34
64      5       29ns    MMI     C67413A 50.00
64      9       67ns    TRW     TDC1030 75.00?
256     8       205ns   TI      TMS9650 ?
512     9       228ns   Mostek  4501-20 27.50   26.00   17.07   stock
512     9       175ns   Mostek  4501-15 30.00   27.50   17.27   stock
512     9       140ns   Mostek  4501-12 31.00   29.50   20.12   1Q85
512     9       -       Mostek  4501-10 -       -       -       15.40 10K December
512     9       -       Mostek  4501-8  -       -       -       -
64-4K   -       125ns   Signetics       8X60    20.50   20.50           FIFO RAM controller



A related product is the dual-port RAM:

Synertek SY2130 1024x8  100 ns
        SY2131 1024x8  100 ns
        SY2132 512x8   100 ns
        SY2133 512x8   100 ns

IDT     7130    1024x8  120, 100, 90 ns
       7132    2024x8  120, 100, 90 ns
--
Ken Turkowski @ CADLINC, Menlo Park, CA
UUCP: {amd,decwrl,hplabs,seismo,spar}!turtlevax!ken